Multi-Sub Optimizer Reference (page 18)

Special Topics: Tips and Tricks

In this section, you'll find discussion of miscellaneous program features that can help you be more productive with MSO.

Specifying Filter Parameters and Limits

Make sure you understand the two ways of specifying filter parameter limits, and how to use the filter Properties Window and Application Options dialog to perform those tasks.

Copying and Pasting Filters

You can copy filters in the following ways:

In combination with the filter paste feature, this is a quick way to add many filters to one or more channels. If you choose to copy selected filters of a channel, a dialog box pops up listing the filters in the channel, with a check box next to each one. You can then paste them into the same channel or a different channel of any configuration with Ctrl+V. When pasting filters to a destination channel, sometimes not all filters will be pasted. This can occur if e.g. you try to paste delay blocks, gain blocks or LPFs to a main channel, or if the paste operation would result in too many delay or gain blocks in a sub channel. If not all copied filters are pasted to the destination channel, a tabbed text view is created on the right, listing the filters that weren't pasted and why. This is to show what happened without a dialog box getting in the way. The information in this text view is temporary and not saved with the project. You can also copy filters to another project if desired. To do this, just copy the filters you want, close the project, then open a different one. The filters are still in the clipboard, and so they can be pasted into the newly-loaded project.

The copy and paste commands appear on the edit submenu of the main menu, on context menus in the Config View, and on toolbar buttons. You can see whether the copy or paste commands are available by looking at the appearance of the copy and paste toolbar buttons. If the copy or paste command is enabled (cursor is on an appropriate node), the buttons will show in color. If not, they will display in gray scale. The logic of whether filter paste is enabled is more complex than it first appears. If you have copied e.g. only a delay and a gain block to the clipboard, and you move the cursor to a main channel filter node with the intent of pasting the filters to the main channel, the paste command will be shown as disabled, as neither delay nor gain blocks are compatible to paste into a main channel. To paste the filters using the Ctrl+V keyboard shortcut, be sure the focus is on the Filters node of the desired destination channel in the Config View and not one of the tabbed views on the right.

Saving Graph Traces as FRD Files

You can export any trace to FRD format for import into other programs. To do so, perform the following steps:

Saving Traces as FRD Files
Saving Traces as FRD Files

How Many Subs are Needed?

Earlier versions of the MSO documentation suggested that three or more subwoofers might be needed to get significant improvements with MSO. This appears to have been an overly cautious suggestion. The AVSForum user genesplitter has posted his MSO results with a two-sub system at five listening positions. I've summarized them for clarity below.

First, the data before using MSO:

Two Subwoofers - Before MSO
Two Subwoofers - Before MSO

Next, the data after using MSO:

Two Subwoofers - After MSO
Two Subwoofers - After MSO

Substantial improvements have been made at all listening positions. Based on this new information, usage of MSO can be recommended for systems having two or more subwoofers.